Hong Kong and mainland China are advancing their regulatory frameworks for generative AI in the financial sector, focusing on practical implementation and operational governance. Hong Kong is transitioning from pilot projects to structured applications, emphasizing responsible AI deployment with strong investor protection. The Hong Kong Monetary Authority's initiatives, including the GenA.I. Sandbox and "FinTech 2030" strategy, highlight a shift towards secure AI integration in banking, with a focus on risk management and fraud prevention. In mainland China, AI regulation is becoming more operational and rule-based, with a focus on content labeling, algorithm registration, and lifecycle governance. Recent measures emphasize transparency, traceability, and ethical governance, requiring financial institutions to demonstrate compliance through structured documentation and operational controls. These developments reflect a broader trend towards integrating AI governance into existing financial regulatory frameworks, ensuring responsible AI use across the sector.